St. charles is located in Hopkins county Kentucky with a geographic area of 1.0 square miles. The total population in St. charles is 305 with 53.8% male and 46.2% female. Children under age 5 represent 4.9% of the population, under age 18 equal 28.9% of the population and over age 65 is 13.4% of the population. The median household income is $28,750, per capita income is $14,827. There are a total of 120 housing units with 65.8% owner occupied. Education includes 40.8% of residents that are high school graduates and 5.0% with a bachelor's degree or higher. The average temperature in St. charles in the summer is 76 degrees, and in the winter 36 degrees.